#include<stdio.h>
#include<stdlib.h>

int main()
{
    int dividend = 20;
    int divisor = 5;
    int quotient;

    if(divisor == 0)
    {
        fprintf( stderr, "除数为0 退出运行 。。。\n");
        exit(EXIT_FAILURE);
    }
    quotient = dividend / divisor;
    fprintf(stderr, "quotient 变量的值为： %d\n", quotient);

    exit(EXIT_SUCCESS);
}